[RFC][PATCH v6 06/19] Add a function to indicate if device use external buffer.

[xiaohui . xin]

From: Xin Xiaohui <xiaohui.xin@xxxxxxxxx>

Signed-off-by: Xin Xiaohui <xiaohui.xin@xxxxxxxxx>
Signed-off-by: Zhao Yu <yzhao81new@xxxxxxxxx>
Reviewed-by: Jeff Dike <jdike@xxxxxxxxxxxxxxx>
---
 include/linux/netdevice.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 31d9c4a..0cb78f4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1602,6 +1602,11 @@ extern void netdev_mp_port_detach(struct net_device *dev);
 extern int netdev_mp_port_prep(struct net_device *dev,
 			struct mpassthru_port *port);
 
+static inline bool dev_is_mpassthru(struct net_device *dev)
+{
+	return (dev && dev->mp_port);
+}
+
 static inline void napi_free_frags(struct napi_struct *napi)
 {
 	kfree_skb(napi->skb);
-- 
1.5.4.4

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